Currently the spell id tracked for shannox's spear is self:Log("SPELL_CAST_SUCCESS", "HurlSpear", 99978)

But the actual spell id (on classic cata at least) is the one used for the bar as well (100002)
11/8/2024 20:16:08.0281 SPELL_CAST_SUCCESS,Creature-0-4459-720-17811-53691-00002E62D9,"Shannox",0xa48,0x0,Creature-0-4459-720-17811-53752-00002E6375,"Spear of Shannox",0xa48,0x0,100002,"Hurl Spear",0x1,Creature-0-4459-720-17811-53691-00002E62D9,0000000000000000,85636991,114236360,0,0,0,-1,0,0,0,-249.07,105.64,367,3.9257,88

No bar is shown as a result of the above.

Edit: Wary is also using the wrong spell id, it should be 100167 instead self:Log("SPELL_AURA_APPLIED", "WaryDog", 99838)
Log of Wary being applied:
11/8/2024 20:16:09.6531 SPELL_AURA_APPLIED,Creature-0-4459-720-17811-53695-00002E62D9,"Rageface",0xa48,0x0,Creature-0-4459-720-17811-53695-00002E62D9,"Rageface",0xa48,0x0,100167,"Wary",0x1,BUFF

Wary looks fine to me, it uses immolation trap as per the code comment.